Improvement in tuck-creasers for sewing-machines



E. BOSTOCK.

Tuck Creaser for Sewing Machines.

' No. 80,269. Patented July 2a, 1868.

UNITED STATES PATENT FFIEO EDWARD BOSTOOK, on ALBANY, New YORK.

IMPROVEMENT I N TUCK-CREASERS FOR SEWING-MACHINDSL Specification forming part of Letters Patent No. 80,269, dated July 28, 186D.

To all whom it may concern:

' invented certain Improvements in Tuck Greasers and Guides; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of my in ventiou sufficient to enable those skilled in the art to practice it.

The objectot' my invention is to simplify and render more efficient and useful than hitherto the class of implements known as tuck creasers or'markers, and which are usually, though not necessarily, used in connection with a sewing-machine; and my improvements relate more particularly to that variety of implement in which the creasing or marking apparatusis arranged for adjustment relatively to the needle, and also to a gage-plate which is made at- I tachable to the bed-plate of a sewing-machine.

I will proceed to describe my improvements and to state the advantages resulting therefrom. v c

Figure 1 represents myim proved tuck-creus' I er, Fig. 2, a cross-section of the forward end of the gage-plate; Fig. 3, across-section of the rear end ofthe same 5 Fig.4, a modified form of construction of a gage-plate, to enable the same tuck-creaser to be applied to the beds of dilferent styles of sewing-machines Fig. 5, a

cross-section of the forward end of such lastnamed gage; and Fig. 6, a cross-section of the rear end of the same, with its dovetailed slide in place therein.

It is of the utmost importance in operating with creasing attachments, especially when applied to a sewing-machine, that all the parts should be securely fixed in position relatively to each other, so that when the machine is in operation a true parallelism of the gage-plate, straight-edge,and the creasingdevices shall be preserved with perfect certainty, and not be subject, as most, if not all, such devices have hitherto been constructed, to a deflection ofone out of true parallelism with the other when ever the screw which hplds them may not be made to hold them very tightly, or whenever any undue strain or movement of one shall force it from its proper position. To secure such desirable end, and to avoid the difficulty stated and the consequences resulting therefrom, I

make in the main plateA(wl1ich, as in my patent of May 7,1867, supports an arm and creasing-wheel) a longitudinal slot or groove, B, to form a track or bed for a projection, O, on the under side of the rear end of the gage-plate D, this projection and groove positively preventing any lateral moveuientof the gage relatively to the bed-plate at that point; and at the forward end of the gage-platel place a similar down ward projection,E, upon theextreme outer part of the straight-edge, andwhich isdesigned to come outside of and bear against tlieouter edge of the bed-plate A. That portion of the gage-plate which projects beyond the side of A, I make of sufficient thickuess'to rest upon the table of the machine and be nearly or quite flush with the under surface of plate A;,and through this part (hilt not, as has heretofore been the practice, through plate A) I make a longitudinal slot to receive the thumb-screw which is employed to secure the implement to the table and to allow of its adjustment. Instead of the groove being made in A and the projection formed on plate D, a groove or slot may be in D and the projection on A. The

space between E and F, as shown in Fig.2, is cut away of sufficient breadth to allow the gage at its forward end snugly to span the plate A, and so, with U and D, keep steady and prevent any lateral movem cut or play of theplates relatively to each other-rat the forwar lrend of the by merely loosening the screw, the removal of the under plateand its creaser from 011' the sewing-machine without the need of removing the gagepla-te, which thus may remain for use as such, as in ordinary cases where no creaser is employed, and without the need of lifting said gage-plate any higher than sufticient to release E from groove B. This is of great importance,

and no creaser ortucker'or similar attachment, .so far as I am aware, has ever been thus con- I screw, as is well known, are variously located,

and by means of which the same gage-plate of my apparatus may be placed in the desired position upon the machine by the same slotted piece and the same screw. This inodeis illustrated in Fig. 4, inwhieh H represents the gageplate open throughout most of its length, and I a dovetailed slide fitted to ride in dovetailed on'equivalent grooves therein, as shown in Fig. 6. K represents the opening in plate II, and L the slot in slide I for the reception of the thumb-screw. M is a small pin, lip, or stop to prevent the slide from becoming at any time detached from the plate. This form of gageplate being-applied to a creaser, insteadof the form first above described, it is evident that wherever may be the location in any sewingmachine ofthe screw-hole to receive the thumbscrew this plate may be used, the only condition necessary being that the quadrangle described by the length of slot L (for the two short sides of the quadrangle) and 'by the distance it is permitted to slide (for the two longer sides of the quadrangle) shall be in the first instance made large enough to inclose within v its area a space sufficient to take in all the by shifting the thumb-screw in slot L it may be brought into position for any hole which may be brought under any part of such slot.

Inasmuch as the screw-hole for a gage is in some machines placed in a line'with the needle, in others in front of the'needle, and in others back ,of the needle, the importance of this improvement, which adapts the device to all of them, cannot be overestimated and does not require tobe further set forth.

I do not confine myself to making my tucker with a right-angled projection, as some of my earliest drawings and tuckers have the wheel on.the end of the spring-arm.

In place of thegrooved wheel I sometimes have attached to the arm N a cylinder or tube having a notch or groove opposite the blade and a spiral groove out into or a spiral piece of metal fixed on the outside of said cylinder or roller, which will rest upon the work, thus causing the roller to turn with the action of the feed and the spiral groove or projection to keep the work up to the gage.

By constructing for all the machines used in the market one kind of gage-plate only I may, by putting a'slot of any desired width at any desired position, fit any particular machine with the same creaser.

I claim-'- 1. A tuck-creasing device constructed sub stantially as described, in combination with the plate A and gage-plate D, both constructed and arrangedsubstantially as described, and the plate D, serving to confine A to the bed-plate, as set forth. 2. A gage-plate or guide for a sewing-machine, when provided with an adj ustablepiece, I, having a slot, as and for the purpose set forth. 3. The gage-plate H, slideI, and creasing device, combined to admit of adjusting the apparatus in any desired position relatively to the needle and feeding deviceof different machines by means of a single screw. c

.4, The tuck-creaser and gage plate for use with or without a sewing-machine, when the whole is constructed as described.

EDWARD Bo'sTooK. Witnesses:

R. Rose, G. It. HODGKINS. 

